Skip test which is causing ERRORs in dotest.py after r237053
This test runs fine on its own, but leaves python in a bad state to
where all tests that run after it error out. See llvm.org/pr24575.
This resolves the concerns raised in http://reviews.llvm.org/rL237053.
Reviewed by: clayborg, ted
Differential Revision: http://reviews.llvm.org/D12329